diff --git a/packages/base/src/utils/network.ts b/packages/base/src/utils/network.ts
index 1693e08e..eeee0327 100644
--- a/packages/base/src/utils/network.ts
+++ b/packages/base/src/utils/network.ts
@@ -20,9 +20,11 @@ type PublicNetwork =
   | 'fuji'
   | 'optimism'
   | 'optimism-goerli'
+  | 'optimism-sepolia'
   | 'arbitrum'
   | 'arbitrum-nova'
   | 'arbitrum-goerli'
+  | 'arbitrum-sepolia'
   | 'celo'
   | 'alfajores'
   | 'harmony-s0'
@@ -67,9 +69,11 @@ export const Networks: Network[] = [
   'fuji',
   'optimism',
   'optimism-goerli',
+  'optimism-sepolia',
   'arbitrum',
   'arbitrum-nova',
   'arbitrum-goerli',
+  'arbitrum-sepolia',
   'celo',
   'alfajores',
   'harmony-s0',
@@ -124,9 +128,11 @@ const chainIds: { [key in Network]: number } = {
   'fuji': 0xa869,
   'optimism': 10,
   'optimism-goerli': 420,
+  'optimism-sepolia': 11155420,
   'arbitrum': 42161,
   'arbitrum-nova': 42170,
   'arbitrum-goerli': 421613,
+  'arbitrum-sepolia': 421614,
   'celo': 42220,
   'alfajores': 44787,
   'harmony-s0': 1666600000,